Unable to remove incorrect information

This has happened a few times, but the most recent occurrence was when I tried to remove the death date for someone who is not dead. This gives an error message saying "death: This field is required." I think the ability for a user to remove these things is important if the information is false or unknown. I've also seen this with release dates for games which haven't been announced.

Once any sort of date has been added (birth, death, release date) it can't be removed. It's annoying, and I hope they fix it.